/**
* Delegate synchronization to agent. / public void invokeLater(final Runnable action) { //
* Redirect to component instance. interpreter.invokeLater(action);
*
* <p>// Called from outside (e.g. workflow client) // when task is finished // Check if plan
* should be set to ready (Hack!!!) // interpreter.invokeLater(new Runnable() // { // public void
* run() // { // // The DefaultActivityHandler.step() may rethrow an exception that // // occurred
* within task execution. // // It is catched an stored in the plan to be rethrown from the // //
* BPMNPlanExecutor.executeStep() method. // // The plan must always be set to ready to transfer
* the state // // of the process thread to the plan. // try // { // action.run(); // } //
* catch(Throwable t) // { // state.setAttributeValue(rplan,
* OAVBDIRuntimeModel.plan_has_exception, t); // } // state.setAttributeValue(rplan,
* OAVBDIRuntimeModel.plan_has_processingstate, OAVBDIRuntimeModel.PLANPROCESSINGTATE_READY); //
* //// String lane = getLane(getLastState()); //// if(isReady(null, lane)) //// { ////
* state.setAttributeValue(rplan, OAVBDIRuntimeModel.plan_has_processingstate,
* OAVBDIRuntimeModel.PLANPROCESSINGTATE_READY); //// } // } // }); }
*
* <p>/** Method that should be called, when an activity is finished and the following activity
* should be scheduled. Can safely be called from external threads.
*
* @param activity The timing event activity.
* @param instance The process instance.
* @param thread The process thread.
* @param event The event that has occurred, if any.
*/
public void notify(final MActivity activity, final ProcessThread thread, final Object event) {
if (isExternalThread()) {
getComponentAdapter()
.invokeLater(
new Runnable() {
public void run() {
if (isCurrentActivity(activity, thread)) {
try {
getStepHandler(activity)
.step(activity, BpmnPlanBodyInstance.this, thread, event);
} catch (Throwable t) {
if (state.containsObject(rplan))
state.setAttributeValue(rplan, OAVBDIRuntimeModel.plan_has_exception, t);
}
thread.setNonWaiting();
if (state.containsObject(rplan)) {
// System.out.println("Ready: "+activity+" "+thread);
state.setAttributeValue(
rplan,
OAVBDIRuntimeModel.plan_has_processingstate,
OAVBDIRuntimeModel.PLANPROCESSINGTATE_READY);
}
} else {
System.out.println("Nop, due to outdated notify: " + thread + " " + activity);
}
}
});
} else {
if (isCurrentActivity(activity, thread)) {
try {
getStepHandler(activity).step(activity, BpmnPlanBodyInstance.this, thread, event);
} catch (Throwable t) {
if (state.containsObject(rplan))
state.setAttributeValue(rplan, OAVBDIRuntimeModel.plan_has_exception, t);
}
thread.setNonWaiting();
if (state.containsObject(rplan)) {
// System.out.println("Ready: "+activity+" "+thread);
state.setAttributeValue(
rplan,
OAVBDIRuntimeModel.plan_has_processingstate,
OAVBDIRuntimeModel.PLANPROCESSINGTATE_READY);
}
} else {
System.out.println("Nop, due to outdated notify: " + thread + " " + activity);
}
}
}
/**
* Make a process step, i.e. find the next edge or activity for a just executed thread.
*
* @param activity The activity to execute.
* @param instance The process instance.
* @param thread The process thread.
*/
public void step(
MActivity activity, BpmnInterpreter instance, ProcessThread thread, Object event) {
// System.out.println(instance.getComponentIdentifier().getLocalName()+": step "+activity+",
// data "+thread.getData());
// Hack!!! Should be in interpreter/thread?
thread.updateParametersAfterStep(activity, instance);
MNamedIdElement next = null;
ThreadContext remove = null; // Context that needs to be removed (if any).
Exception ex = thread.getException();
// Store event (if any).
if (event != null) {
thread.setParameterValue("$event", event);
// System.out.println("Event: "+activity+" "+thread+" "+event);
}
// Timer occurred flow
if (AbstractEventIntermediateTimerActivityHandler.TIMER_EVENT.equals(event)) {
// Cancel subflows.
remove = thread.getThreadContext().getSubcontext(thread);
// Continue with timer edge.
List outedges = activity.getOutgoingSequenceEdges();
if (outedges != null && outedges.size() == 1) {
next = (MSequenceEdge) outedges.get(0);
} else if (outedges != null && outedges.size() > 1) {
throw new RuntimeException("Cannot determine outgoing edge: " + activity);
}
}
// Find next element and context(s) to be removed.
else {
boolean outside = false;
ThreadContext context = thread.getThreadContext();
while (next == null && !outside) {
// Normal flow
if (ex == null) {
List outgoing = activity.getOutgoingSequenceEdges();
if (outgoing != null && outgoing.size() == 1) {
next = (MSequenceEdge) outgoing.get(0);
} else if (outgoing != null && outgoing.size() > 1) {
throw new UnsupportedOperationException(
"Activity has more than one one outgoing edge. Please overridge step() for disambiguation: "
+ activity);
}
// else no outgoing edge -> check parent context, if any.
}
// Exception flow.
else {
List handlers = activity.getEventHandlers();
for (int i = 0; handlers != null && next == null && i < handlers.size(); i++) {
MActivity handler = (MActivity) handlers.get(i);
if (handler.getActivityType().equals("EventIntermediateError")) {
// Todo: match exception types.
// Class clazz = handler.getName()!=null ? SReflect.findClass0(clname, imports,
// classloader);
next = handler;
}
}
}
outside = context.getParent() == null;
if (next == null && !outside) {
// When last thread or exception, mark current context for removal.
if (context.getThreads().size() == 1 || ex != null) {
activity = (MActivity) context.getModelElement();
remove = context;
context = context.getParent();
// Cancel subprocess handlers.
if (activity instanceof MSubProcess) {
List handlers = activity.getEventHandlers();
for (int i = 0; handlers != null && i < handlers.size(); i++) {
MActivity handler = (MActivity) handlers.get(i);
instance
.getActivityHandler(handler)
.cancel(handler, instance, remove.getInitiator());
}
}
}
// If more threads are available in current context just exit loop.
else if (context.getThreads().size() > 1) {
outside = true;
}
}
}
}
// Remove inner context(s), if any.
if (remove != null) {
thread = remove.getInitiator();
thread.setNonWaiting();
// Todo: Callbacks for aborted threads (to abort external activities)
thread.getThreadContext().removeSubcontext(remove);
}
if (next != null) {
// Todo: store exception as parameter!?
if (ex != null) thread.setException(null);
} else if (ex != null) {
if (ex instanceof RuntimeException) throw (RuntimeException) ex;
else throw new RuntimeException("Unhandled exception in process: " + activity, ex);
}
// Perform step settings, i.e. set next edge/activity or remove thread.
if (next instanceof MSequenceEdge) {
thread.setLastEdge((MSequenceEdge) next);
} else if (next instanceof MActivity) {
thread.setActivity((MActivity) next);
} else if (next == null) {
thread.getThreadContext().removeThread(thread);
} else {
throw new UnsupportedOperationException("Unknown outgoing element type: " + next);
}
}
